Two children and their grandparents were injured when they were were hit by a motorcycle on Thursday afternoon.
The four were out walking when the accident happened on the corner of London Road and Robin Road in Ipswich, Suffolk.
One child was airlifted to Addenbrooke's Hospital in Cambridge. The two adults and a second child were taken to Ipswich Hospital.
None of those injured has been named and their conditions are not known.
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